Nickel(0)/Dihydroimidazol-2-ylidene Complex Catalyzed Coupling of Aryl Chlorides and Amines
摘要:
A general and simple nickel-catalyzed coupling of aryl chlorides and amines is reported. The scope and limitations of the coupling process using Ni(0), 1,3-bis(2,6-diisopropylphenyl)dihydroimidazol-2-ylidene, and NaO-t-Bu as base were investigated. Secondary cyclic and acyclic amines and anilines provided the arylamine coupling products in good to excellent yields. Compared to palladium-catalyzed aminations, this procedure offers an alternative route to N-substituted anilines starting from readily available aryl chlorides.
Nickel-catalysed couplings of aryl chlorides with secondary amines and piperazines
作者:Eric Brenner、Raphaël Schneider、Yves Fort
DOI:10.1016/s0040-4020(99)00788-7
日期:1999.10
The reaction of aryl chlorides with secondary amines or piperazines in the presence of an in situ generated liganded nickel catalyst gives arylamines in good yields. Our process provides a mild, convenient and cheap method of arylamination starting from readily available substrates. (C) 1999;Elsevier Science Ltd. All rights reserved.
Nickel-catalysed amination of aryl chlorides using a dihydroimidazoline carbene ligand
作者:Benoı̂t Gradel、Eric Brenner、Raphaël Schneider、Yves Fort
DOI:10.1016/s0040-4039(01)01079-6
日期:2001.8
A new arylamination protocol has been developed using a catalyst combination prepared from Ni(acac)(2) associated to a sterically hindered dihydroimidazoline carbene ligand. A high efficiency was attained using, in most cases, only 2 mol%. Ni/carbene clusters. (C) 2001 Elsevier Science Ltd. All rights reserved.